<template>
	<!-- 遮罩层 -->
	<view class="contract-viewer-mask" :class="{ show: visible }" @click="handleMaskClick">
		<!-- 内容区域 -->
		<view class="contract-container" :class="{ show: visible }" @click.stop>
			<!-- 标题栏 -->
			<view class="header">
				<text class="title">阅读并确认下列协议</text>
				<view class="close-btn" @click="close">
					<u-icon name="close" color="#999" size="20"></u-icon>
				</view>
			</view>

			<!-- 合同内容区域 -->
			<view class="content-wrapper">
				<!-- 固定高度的内容区域 -->
				<view class="fixed-content" :style="{ height: '600rpx' }">
					<scroll-view scroll-y class="contract-content" :style="{ height: '100%' }">
						<!-- 合同内容 -->
						<view class="contract-detail" v-if="currentAgreement.file">
							<rich-text :nodes="currentAgreement.file"></rich-text>
						</view>
					</scroll-view>
				</view>

				<!-- 协议列表区域 -->
				<view class="agreement-section">
					<scroll-view scroll-y class="agreement-list-scroll" :style="{ height: contentHeight - 600 + 'rpx' }">
						<view v-for="(item, index) in agreements" :key="index" class="agreement-item" @click="selectAgreement(index)">
							<text class="agreement-name" :class="{ active: currentIndex === index }">{{ item.title }}</text>
							<text v-if="index === 0" class="agreement-count">共{{ agreements.length }}份协议</text>
						</view>
					</scroll-view>
				</view>
			</view>

			<!-- 底部按钮 -->
			<view class="footer">
				<button class="confirm-btn" @click="handleConfirm" :disabled="!currentAgreement" :class="{ disabled: !currentAgreement }">同意并确认</button>
			</view>
		</view>
	</view>
</template>

<script>
export default {
	name: 'ContractViewer',
	props: {
		// 是否显示弹窗
		visible: {
			type: Boolean,
			default: false
		},
		// 主合同标题
		mainContractTitle: {
			type: String,
			default: '委托采购合同'
		},
		// 协议列表
		agreements: {
			type: Array,
			default: () => []
		}
	},
	data() {
		return {
			currentIndex: 0,
			contentHeight: 400 // 默认高度，会在mounted中计算
		};
	},
	computed: {
		currentAgreement() {
			return this.agreements[this.currentIndex] || {};
		}
	},
	mounted() {
		this.calculateContentHeight();
	},
	watch:{
		visible(){
			this.currentIndex = 0
		}
	},
	methods: {
		// 计算内容区域高度
		calculateContentHeight() {
			const systemInfo = uni.getSystemInfoSync();
			// 弹窗总高度为屏幕高度的70%，减去头部和底部高度
			this.contentHeight = systemInfo.windowHeight * 0.7 - 100 - 80;
		},

		// 选择协议
		selectAgreement(index) {
			this.currentIndex = index;
		},

		// // 加载协议内容
		// async loadAgreementContent(id) {;
		// },

		// 点击遮罩层
		handleMaskClick() {
			this.close();
		},

		// 关闭弹窗
		close() {
			this.$emit('update:visible', false);
			this.$emit('close');
		},

		// 确认协议
		handleConfirm() {
			if (!this.currentAgreement) return;
			this.$emit('confirm', this.currentAgreement);
			this.close();
		}
	}
};
</script>

<style lang="scss" scoped>
.contract-viewer-mask {
	position: fixed;
	top: 0;
	left: 0;
	right: 0;
	bottom: 0;
	background-color: rgba(0, 0, 0, 0.5);
	z-index: 999;
	opacity: 0;
	visibility: hidden;
	transition: all 0.3s ease;

	&.show {
		opacity: 1;
		visibility: visible;
	}
}

.contract-container {
	position: absolute;
	left: 0;
	right: 0;
	bottom: 0;
	background-color: #fff;
	border-radius: 24rpx 24rpx 0 0;
	transform: translateY(100%);
	transition: transform 0.3s ease;
	max-height: 80vh;
	display: flex;
	flex-direction: column;

	&.show {
		transform: translateY(0);
	}
}

.header {
	position: relative;
	height: 100rpx;
	display: flex;
	justify-content: center;
	align-items: center;
	border-bottom: 1px solid #f5f5f5;

	.title {
		font-family: Source Han Sans CN;
		font-weight: 500;
		font-size: 30rpx;
		color: #333333;
		line-height: 32rpx;
	}

	.close-btn {
		position: absolute;
		right: 30rpx;
		top: 50%;
		transform: translateY(-50%);
		padding: 10rpx;
	}
}

.content-wrapper {
	flex: 1;
	display: flex;
	flex-direction: column;
	overflow: hidden;
}

.fixed-content {
	border-bottom: 1px solid #f5f5f5;
	background-color: #fff;
}

.contract-content {
	width: 100%;
	padding: 20rpx 30rpx;
	box-sizing: border-box;
}

.agreement-section {
	flex: 1;
	display: flex;
	flex-direction: column;
	overflow: hidden;
	background-color: #F1F1F1;
	padding: 20rpx 0;
}

.section-title {
	padding: 24rpx 30rpx;
	font-size: 28rpx;
	color: #666;
	background-color: #f8f8f8;
}

.agreement-list-scroll {
	flex: 1;
	overflow-y: auto;
}

.contract-detail {
	padding: 20rpx 0;
	font-size: 28rpx;
	line-height: 1.6;
	color: #333;
}

.main-contract {
	padding: 30rpx 0;
	text-align: center;

	.main-title {
		font-size: 36rpx;
		font-weight: bold;
		color: #333;
	}
}

.agreement-list {
	margin-bottom: 30rpx;
	background-color: #f9f9f9;
	border-radius: 12rpx;
	overflow: hidden;
}

.agreement-item {
	display: flex;
	align-items: center;
	padding: 15rpx 30rpx;
	border-bottom: 1px solid #f5f5f5;
	// background-color: #fff;

	.agreement-name {
		flex: 1;
		font-family: PingFang SC;
		font-weight: bold;
		font-size: 24rpx;
		line-height: 32rpx;
		color: #999999;

		&.active {
			color: #666666;
		}
	}

	.u-icon {
		margin-left: 16rpx;
	}
}

.contract-detail {
	padding: 20rpx 0 40rpx;
	font-size: 26rpx;
	color: #666;
	line-height: 1.6;
}

.footer {
	padding: 20rpx 30rpx 40rpx;
	background-color: #F1F1F1;
	.confirm-btn {
		height: 88rpx;
		line-height: 88rpx;
		background: #ff4400;
		border-radius: 44rpx;
		font-family: PingFang SC;
		font-weight: bold;
		font-size: 36rpx;
		color: #ffffff;
		text-align: center;
		border: none;

		&::after {
			border: none;
		}

		&.disabled {
			opacity: 0.6;
		}
	}
}
</style>
